JPH06181884A - Endoscope - Google Patents

Abstract

PURPOSE:To load every kind of functional member including a treatment tool provided with a large operating mechanism part by forming a screw part to attach/detach every kind of functional member at the treatment tool derivation port of a treatment tool insertion path. CONSTITUTION:The treatment tool derivation port 12 is formed at the tip hardened part of the insertion part 1 of an endoscope. A connection pipe 15 is inserted by fitting in the treatment tool derivation port 12, and a treatment tool insertion channel 13 is connected to the pipe. A pore diameter is expanded by forming a step on the tip opening part side of the treatment tool derivation port 12, and the screw part 16 is formed at the inner plane of the pore diameter. A connection ring 17 is always inserted spirally to the screw part 16, and the treatment tool derivation port 12 forms a uniform pore diameter. In such a case, every kind of functional member instead of the connection ring 17 can be loaded on the treatment tool derivation port 12. Thereby, a forceps provided with a clamping claw with pore diameter larger than that of the treatment insertion channel B and another kind of functional member can be loaded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope used for medical purposes or the like, and more particularly to an endoscope in which various functional members can be attached to its insertion portion.

[0002]

2. Description of the Related Art In general, an endoscope is provided with an insertion section for inserting a body cavity or the like in a body operation section, and an illumination window and an observation window are formed at the tip of this insertion section so that illumination light is emitted from the illumination window. It is for performing an examination and diagnosis inside the body cavity through the observation window below. Further, a treatment instrument insertion passage is provided so that cells can be collected, an affected area can be extracted, and other treatment can be performed in a state where the insertion portion is inserted into the body cavity. The treatment instrument insertion passage has a treatment instrument introducing portion provided in the main body operating portion and a treatment instrument outlet port provided at the tip of the insertion portion, and the treatment instrument introducing portion is flexible between the treatment instrument introducing portion and the treatment instrument outlet port. A treatment instrument insertion channel made of a flexible tube body is interposed. Therefore, by inserting a treatment tool such as forceps from the treatment tool introducing section,
It is configured to pass through the treatment tool insertion channel and to be projected outside from the treatment tool lead-out port.

Here, there are various treatment tools such as forceps, a high frequency knife, a high frequency snare, an injection needle, and a tube for supplying a contrast medium. Since the injection needle and the tube have a uniform outer diameter as a whole, it is necessary to use an outer diameter that is smaller than the treatment instrument insertion channel. On the other hand, in a treatment tool such as forceps, a control cable for performing an opening / closing operation of the operating mechanism section is connected to an operating mechanism section such as a grasping claw provided at the tip, and the control cable The control cable is formed to have an operation portion at its end, and the control cable is formed to be at least longer than the entire length of the treatment instrument insertion channel. When the treatment instrument is inserted, the operation mechanism section is passed through the treatment instrument insertion channel to allow the treatment instrument to be inserted. With the operation unit located outside the treatment instrument introducing section, the operation mechanism section is opened and closed by a remote operation while the operation mechanism section is protruded from the exit port by a predetermined length.

[0004]

By the way, among the above-mentioned treatment tools, those having an actuating mechanism portion at the tip thereof, such as forceps, are used in order to more efficiently perform treatment such as extraction of the affected area. It is preferable to use a large one to some extent. However, since the treatment tool is inserted through the treatment tool insertion channel, this actuating mechanism is restricted by the inner diameter dimension of the treatment tool insertion channel, and it cannot be enlarged in order to improve the efficiency of the treatment. become. In particular, in recent years, there is a strong demand for reducing the diameter of the insertion portion from the viewpoint of reducing the pain of the patient, and from this point as well, the size of the operating mechanism portion as a treatment tool is increasingly restricted. Further, if various functional members other than the above-described treatment tools can be used for the endoscope, the accuracy of inspection, diagnosis, etc. can be improved, but it is not always possible to use various functional members. It's not.

The present invention has been made in view of the above points, and an object thereof is to enable mounting of various functional members including a treatment instrument having a large actuating mechanism. To provide an endoscope.

[0006]

In order to achieve the above object, the present invention allows various functional members to be attached / detached to / from a treatment instrument outlet of a treatment instrument insertion passage through which a treatment instrument such as forceps is inserted into an insertion portion. It is characterized in that a threaded portion is formed so as to be attachable to the.

[0007]

In the forceps of the treatment instrument, the control cable can be formed to have a small diameter and can be inserted into the treatment instrument insertion channel. Therefore, only the control cable is inserted into the treatment instrument insertion channel, and the treatment instrument lead-out port is provided with a threaded portion. Therefore, the operation mechanism portion such as the gripping claw is screwed to this threaded portion. As a result, the actuating mechanism is not restricted by the inner diameter of the treatment instrument insertion channel and can be formed in a desired size. Moreover, since the control cable can be led out from the main body operating section via the treatment instrument insertion channel, there is no fear of interfering with the operation of this operating mechanism section.
Further, the member screwed to the treatment instrument outlet is not limited to the gripping claws of the forceps, but an appropriate functional member such as a sensor for detecting pressure or temperature in the body can be attached. And
In a sensor or the like, a signal cable is provided to take out an output signal from the sensor to the outside, but this signal cable may be inserted into the treatment instrument insertion channel.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows a schematic configuration of the endoscope. This endoscope is generally composed of an insertion section 1 to be inserted into a body cavity, a main body operation section 2 connected to a proximal end of the insertion section 1, and a universal cord 3. The insertion part 1 has a distal end hard part 1a, an angle part 1b, and a flexible part 1c in order from the distal end side.
Has become. The lighting window 1
0, an observation window 11, a treatment instrument outlet 12, and the like are formed. A treatment instrument insertion channel 13 is provided in the treatment instrument outlet 12.
The treatment instrument insertion channel 13 passes through the entire insertion portion 1, and the other end thereof is connected to a treatment instrument introduction portion 14 provided in the vicinity of a continuous portion to the main body operation portion 2.

Next, FIG. 2 shows a cross section of the distal end portion of the insertion portion 1. The treatment instrument lead-out port 12 is formed of a through hole formed in the distal end hard portion 1a, and the treatment instrument lead-out port 12 has a connection pipe 15 in it.
Is inserted and the treatment instrument insertion channel 13 is connected to the connection pipe 15. A step is formed on the distal end opening side of the treatment instrument lead-out port 12 to increase the hole diameter, and a threaded portion 16 is formed on the inner surface thereof. A connecting ring 17 having a thread groove on the outer peripheral surface is always screwed into the threaded portion 16, and thus the treatment instrument outlet 12 has a uniform hole diameter. Reference numeral 18 is an observation mechanism including an objective lens 18a and a solid-state image sensor 18b.

Here, various functional members can be attached to the treatment instrument outlet 12 in place of the connecting ring 17. As this functional member, there is a forceps operating mechanism 20 as shown in FIGS. The forceps operating mechanism 20 has a pair of grip claws 21 and 21.
1, 21 are rotatably connected to a shaft 22. The grip claw 21 is provided with extending portions 21a, 21a continuously extending from the connecting portion to the shaft 22 toward the base end side, and the links 23, 23 are pivotally attached to the extending portions 21a, 21a. ing. The other end of the link 23 is pivotally attached to the holding body 24.
A threaded portion is formed on the outer surface of the holding body 24, and the threaded portion is screwed into the treatment instrument outlet 12.

Reference numeral 25 denotes an operation wire for opening and closing the gripping claws 21 and 21 constituting the forceps actuating mechanism 20, and one end of this operation wire 25 is fixed to a connecting portion 26 connected to the shaft 22. , Extends through a wire insertion passage 24a formed in the holding body 24. Between the connecting portion 26 of the operating wire 25 and the holding body 24, the holding claws 21 and 2 are always provided.
A spring 27 that biases 1 in the direction of closing is elastically mounted. On the other hand, when the shaft 22 is displaced by the operation wire 25 against the spring 27 in the direction of approaching the holding body 24, the grip claws 21 and 21 are opened.

The operation wire 25 is the treatment instrument insertion channel 1
3, the other end is led out from the treatment instrument introducing portion 14 and is detachably connected to the operating portion 28. The operation part 28 includes an attachment part 29 that is screwed into the forceps plug attachment / detachment screw part 14 a of the treatment instrument introduction part 14.
An operation member 3 which is slidable in the axial direction on the mounting portion 29.
0, and the operating member 30 is composed of a shaft portion 30a which is provided with a split in the axial direction, and a finger ring 30b which is continuously provided on the shaft portion 30a. Mounting part 2 of operation member 30
A pin 31 is provided in the insertion portion of the operation member 9, and the pin 31 is inserted into the long groove 32 formed in the attachment portion 29 so as to prevent the operation member 30 from coming off and from rotating. . The operation member 30 is provided with a wire insertion portion 30c, and the end portion of the operation wire 25 is inserted into the wire insertion portion 30c, and the set screw 33 is screwed to be fixed.

In order to mount the forceps operating mechanism 20, first, the connecting ring 17 mounted on the treatment instrument lead-out port 12 is removed, and the operation wire 25 is inserted from the treatment instrument lead-out port 12 to the treatment instrument insertion channel. 13 and the holder 24 is screwed into the treatment instrument outlet 12. In addition, the mounting portion 29 of the operation portion 28 is attached to the treatment instrument introducing portion 14.
Then, the distal end of the operation wire 25 is led out from the treatment instrument introducing section 14 to the wire insertion section 3 of the operation member 30.
Insert the tip of the operating wire 25 into the 0c, and set screw 3
Fix with 3. As a result, the forceps operating mechanism 20 is attached to the endoscope in a state in which it can be operated by the operation unit 28.

Here, the gripping claws 21 and 21 constituting the forceps actuating mechanism 20 are not restricted by the inner diameter of the treatment instrument insertion channel 13 and have a size as necessary such as the size of the affected part. be able to. Then, the endoscope in which the forceps actuation mechanism 20 is mounted in this way is inserted into the patient's body or the like, and the fingers of the hand holding the main body operation unit 2 are inserted into the finger hook ring 30b of the operation member 30 to form the shaft portion. By pushing and pulling 30a, the grasping claw 2 of the forceps operating mechanism 20
By opening and closing 1, 21, it is possible to perform operations such as grasping and extracting the affected area.

Next, FIGS. 5 and 6 show a second embodiment of the present invention. In this embodiment, the grasping claw of the forceps actuating mechanism is opened / closed by utilizing hydraulic pressure. Is configured as follows. That is, the pair of gripping claws 41, 41 constituting the forceps actuating mechanism 40 are rotatably mounted on the shaft 42, and the extending part 41a from the connecting part of the gripping claw 41 to the shaft 42 to the proximal end side. , 41a are pivotally attached to links 43, 43, and the links 43, 43 are pivotally attached to a holder 44. An operating rod 45 is connected to the shaft 42, and a tip of the operating rod 45 is connected to a piston 46. The piston 46 is slidably provided in a working chamber 47 formed in the holding body 44, and a spring 48 is elastically mounted between the piston 46 and the inner surface of the working chamber 47 in the holding body 44, so that the piston 46 is always provided. Due to the action of the spring 48, the operating rod 45 is drawn into the operating chamber 47, and the shaft 42 comes to a position close to the holding body 4. In this state, the gripping claws 41,
41 is closed.

When the piston 46 is pushed in the direction against the spring 48, the operating rod 45 extends and the shaft 42 is displaced forward, so that the gripping claws 41, 41 are opened. Piston 4
6 is configured to be pushed by hydraulic pressure. For this reason, the treatment tool insertion channel 13 is filled with a working liquid such as water, and a push member 49 is removably attached to the treatment tool introducing section 14. Therefore, when the pushing member 49 is pushed into the passage of the treatment instrument introducing portion 14, the treatment instrument insertion channel 13 is generated according to the pushing stroke.
Pressure is generated inside, and the action of this pressure causes the piston 46 to be slidably displaced along the working chamber 47.

With the above structure, the forceps operating mechanism 4
No. 0 holding body 44 is screwed into the threaded portion 16 provided in the treatment instrument lead-out port 12, and the working liquid is supplied into the treatment instrument insertion channel 13, and then the pushing member 49 is moved to the treatment instrument introduction section 14. The forceps actuating mechanism 40 is operated by operating the fingers of the hand holding the main body operation unit 2 by simply attaching
It is possible to open and close the grip claws 41, 41 in FIG.

Further, in the above-mentioned first and second embodiments, as the functional member attached to the treatment instrument outlet 12,
Although it was a forceps actuating mechanism with grasping claws, in addition to this,
For example, as shown in FIG. 7, a pigment dispersion member 50 can be used. The pigment-dispersing member 50 is formed by connecting a connecting portion 52, which is screwed into the threaded portion 16 of the treatment instrument outlet 12, to a main body portion 51 having a spherical shape. 53 is formed, and one end of the main body 51 communicates with the spray liquid passage 53, and the other end has a large number of injection holes 54 that open to the outer surface of the main body 51. With this configuration, for example, if a spraying liquid pressure-feeding member such as a syringe is attached to the treatment tool introducing portion 14 and the spraying liquid is pressure-fed into the treatment tool insertion channel 13, the spraying liquid will be a pigment spraying member. The spray liquid is sprayed from each spray hole 54 of 50, and the spray liquid can be deposited over a wide area of the body cavity wall.

Further, as shown in FIG.
A pressure sensor 61 as a functional member is attached to the holder 60, and a connecting portion 62 screwed into the screw portion 16 of the treatment instrument outlet 12 is continuously provided to the holder 60, and a cable 63 is inserted through the connecting portion 62. Alternatively, the cable 63 may be provided and taken out from the treatment instrument insertion channel 13 to the outside via the treatment instrument introducing portion 14. Thus, for example, in a laparoscope, pneumoperitoneum gas is supplied into the body cavity to swell the body cavity, but the pressure of this pneumoperitoneum gas needs to be maintained at a substantially constant state. The patient's safety is monitored by constantly monitoring the pressure in the body cavity and increasing the supply of pneumoperitoneum gas when the pressure decreases and decreasing or blocking the supply when the pressure becomes abnormally high. It is also possible to plan.

As the functional member, various members other than those described above can be attached, and the point is that it can be attached to and detached from the threaded portion of the treatment instrument outlet, and the outer diameter of the functional member itself. Is not restricted by the hole diameter of the treatment instrument insertion channel. Also, if you screw the connecting ring into this thread,
It is also possible to make it function as an ordinary treatment instrument insertion passage.

[0021]

As described above, according to the present invention, the thread portion for detachably attaching various functional members to the treatment instrument outlet of the treatment instrument insertion passage is formed. It is possible to mount forceps having gripping claws larger than the hole diameter of the treatment instrument insertion channel and various other functional members.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an endoscope.

FIG. 2 is a cross-sectional view of a distal end portion of an insertion portion.

FIG. 3 is a structural explanatory view of a functional member showing the first embodiment of the present invention.

FIG. 4 is a structural explanatory view of an operating means of the functional member of FIG.

FIG. 5 is a structural explanatory view of a functional member showing a second embodiment of the present invention.

6 is a configuration explanatory view of an operating means of the functional member of FIG.

FIG. 7 is a structural explanatory view of a functional member showing a third embodiment of the present invention.

FIG. 8 is a structural explanatory view of a functional member showing a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insertion part 12 Treatment tool outlet 13 Treatment tool insertion channel 14 Treatment tool introduction part 16 Screw part 17 Connection ring 20,40 Forceps operation mechanism 21,41 Grasping claw 24,44 Holding body 25 Operation wire 28 Operation part 30 Operation member 46 Piston 50 Dye dispersion member 52 Connection part 54 Injection hole 60 Holder 61 Pressure sensor 63 Connection part

Claims (1)

[Claims] 1. An endoscope having a treatment instrument insertion passage through which a treatment instrument such as forceps is inserted in an insertion portion, wherein various functional members can be detachably attached to a treatment instrument outlet of the treatment instrument insertion passage. An endoscope characterized in that a threaded portion for mounting is formed.